Paper-bag machine.



A. POTDEVN.

PAPER BAG MACHINE.

- APPLICATION mw Nov. 12. 191.2K

jatented Mm Il SHEETSM SHEET POTDEVEN.

PAPER BAG MACHINE.

APPLICATION FILEDVnov. 12, 1912.

Patented Mar. 21, 1916.

Nawal 11 sHsETs-sHiiT 2.

SI1/we wlc Qq) vi me on c.

Mmmm` PAPER BAG MACHINE.

APPLICATEON FILED NOV. i2, i912.

3 T E E H S M s T E E H S A. POTDEVIN.

PAPER BAG MACHINE.

AEPucmoN man Nov. l2, 1912.

Patented MdrE 21, 1916'.

A. Femm/1N.

PAPER BAG MACHINE.

APPLICATION FILED NOV. I2| I9|2.

Patent/@d M111: 21, '1916.

II SHEETS-SHEET 5.

a fm @m Wim/Ww A. POTDEVEN.

PAPER BAG MACHINE.

APPLICATION FILED Nov. I2. 1912.

Patente Mar. 21, 1916.

ll SHEETS-SHEET 6.

A. PODEVlN.

PAPER BAG MACHINE.

. u APPLICATION FILED Nov. I2. 1912. Lf, l Patented MII?. 2l, 1916.

l1 SHEETS-SHEET F.

A. POTDEVIN.

PAPER BAG MACHINE. n

APPLICATION FILED IIov.VI2. I9I2.

`1,1'76,1 63. Papented Maf. 2L 1916.

,v A. POTDEViN.

I PAPER BAG MACHNE. APPLlcmo'N min 11ov.12. 1912.

Patented Mar. 21, 1916.

I SHEETS-SHEET 9.

A. PTDEVIN.

PAPER BAG MACHINE.

APPLICATION mep Nov.12. |912.

Patented Mar. 21,1%@I

1! SHEETS-SHEET 10.

www

STATES PATENT orrion I Anonrn ro'rnnvm, or iano'oxnrmnnw COMPANY,or'BRooKLYN, NEW Yo 'L j i Peruanas MACHINE.

To allwhmi may concern; Be it known that l, ADoLrH Po'rnnvrn, a citizenof the United States, and resident of Brookl. n,in the county of Kingsand State of New York,have inventedy certain ynew anduseful.:Improvements ifn Paper-Bag Ma4 chines, ofivhich the following isa specifij cation. w

This invention relates tol machines for makingpaper bags, havingreference, more especially, .to that class of automatic' machineswhereby Ya web of paper lis progres-l sivelywtransformed into tubingwhich.,` as j rapidly as it is produced, is converted into`bags.ofpredeterminedV length. j

l The principal object of my invention is to j provide', in a bag'machine ofthe class referred to, r'nechanismi of simple and eiiicient.construction and operation whereby bottoms O 'are formedontubularbagblanks.

` .Thef invention, as generally stated, comprises various novel'features'of construction and organizations of mechanisms, whereby the'successive' operations ofopenirig the bot- ;5 tom ends of the tubularblanksand orderly folding. and `closing the same to produce'soi called`sojn"a`re Satchel-bottoms. are accomhereinafter described and claimed.

y l Vhile .l have herein illustrated my inv'ention` withmachines'for'the production of other? well-known types of paper-bags.IntheJdrawings-Figure 1 is a side'el'evationofabag making machineequipped with the;tubecutting mechanisms, and the bot- LO- tom-formingmechanisms embodying lmy in.-

fven'tion.` Fig. 2 is plan of the said tube-cuttingf'and bottom-formingmechanisms. Fig. Bis alongitudinalvertical `section ason the `line ofFig. 2, the cylinder being partly brokenaway toexpose thegrippingdevices. Fig. f3 is a sectionaldetail ofthe adjusting means Ifor`certain cam-actuating devices hereinafter referred to, ,as on the line3EL of ofthe gripper .cylinder` illustrated in Fig. 3,

' its'sha'ft and several other parts being lshown l in section. "Fig 5is a..- transvers`e section through the stationary sldefolders, as onthe line `5'--5. QfFig." 3'. Fig. 6 is. an eleva-Y YORK, Assrsnon Toro'rnnvm `iranienne i vSpecifcatio'n of Letters Patent. i Patented Mar,21, 1916, l Application tiled. November 12, 1,912. SerialNo. 730,973. i

tion of the upper forwarding roller with its 'fold-gripping lingersandadjuncts, the said fingers and their connections being shown at oneend of the roller` in vertical section. In this view the fingers areillustrated in their normal non-engaging position beyond the outerfolded edges of the bag blank which is j indicated by thedotted lines.Fig. 7 is a View similar to Fig. 6, showing the side fin gers in raisedposition preparatory to their being moved toward and upon the foldededges of the Vbag blank. Fig. 8 is a similar l view showing the lingersas in gripping posi- .tion rupon the bag blank. Fig. 9 is an end View ofFig. 6. Fig. l0 is a plan of Fig. 8.

Fig. 11 is an elevation of th'e side gripping fingers and adjuncts ofthe gripper cylinder, showing in section that part of the cylinder inwhich the supoorting members for the fingers are slidingly mounted, andalso portions of the cams for actuating said fingers, said lingers beingrepresented in the raised position which they occupy. just before griping the bellows-sides of the bag blan Fig.- 12is an end elevation ofFig. 11. Fig.

13 is a view similar to Fig. 11, showing the' fingers in the positionwhich they occupy held `by said fingers and clamped by the forwardtransverse gripper, and also showing therearward transverse 'gripper asopen and the blank being introduced thereto by l the rotary tuckingblade. Fig. 16 is a plan of Figs 15. Fig. 17is a partial end View of thecylinder, and the end Hap-holding den vices associated therewith, a bagblank being represented upon the cylinder with the rearwhen they arewithdrawn from the bagward bottom Hap being folded by the travel, f

ing folder roller. Fig.18 is a sectional' side elevation of one of thecarrying chains for the folder roller, showing the curvedv guide for thechain. Fig. 19 is a detail of the cyl4- inder showing the action ofthefinal folding l l roller upon the bottom of the bag. Fig. 20 is Fig-,13. Figxli isa view yof the opposite side adiagram'illustratingthecondition of successive blanks from the cutting station to va point 1nadvance ofthe-tu'cking'devices; the leadmg portion of the bellows-sidedtube krollersjand about to be severed the just preceding blank as being-gripped andopened to produrfge'the lateral tucks' and the up-p'ro'-:jecting fiapsfor the bottom; -and the leading blank as grippedupon rthetransverse in'g folder roller. Fig-21 is a diagram illustrating'thecondition-'of the bottom portion Y of the -Atube a's it is being carriedthrough the side folders lby the cylinder. Fig.,22 is aA plan of Fig.21. Fig. 23 isa sectional elevation ofl the forwarding 'roller as,equipped Witha'fmodiedform of finger gripping deshowing a part of theadjacentcylinder and vices. Fig 24fis an end view of Fig. 23,

one of its gripping fingers which co-act with the 'gripping devices ofthe forwarding roller in..prod u`cing.vthe `lateral tucks of the bagbottom..

l. designates :the main supporting frame which is of suitable shape andsize for its .intended purpose.

. 2.I is the main driving shaft journaled in suitably-located ybearingsin the sides of the main frame. At oneend of the frame Vis mounted` theroll of paper (A, Fig. l) from which the bags are to be made, whichpaper is impelled to suitable pasting`,forming and slitting devicesby'means ofy which itis rovgressively converted v into a bellows-sidedtube having atv prescribed intervals. pairsof parallel longitudinalslits-at and' ,transversely of whichthe tube is periodically' severed inorder to convert it intobagblanks preparatory .to the bottom formingoperations .upon .the forward slitted portions of the successive blanks.Inasmuch as the means for converting the paper into the bellows-sidedand slitted tubing is old, and as my present invention concernsespecially the treatment ofthe tubing after it has been produced, it isnot deemed necessary herein to show or describe in detailthetube-forming and slitting mechanisms other than to indicate ltheirgeneral arrangement ini ,res ect to the cutting and bottoming devices.seerigng At the delivery end of the tubeforming mechanism projects theusual forming plate 3 which vis substantially equal in IWidth to -the`internal width of the .tube and which \r' l plate 1s incased by thetube during its travel. The free edge of this platel extends at'l aright angle to thepath of travelof the tube,

or substantially so, and is preferablyL ser? i rated as .at 4.Immediately `abovethe plate and slightly in rear" of its serrated edgeis a bar 5 theforward edge of which is also preferably serrated,` as at'6.- Hence ifthe leading end of the tube be advanced beyond the serratededges and be securely held, and f Ythe portion ofl the tube contiguousto. such f Forwardly of the cutting members is a a gear wheel 13 on thedriving shaft through ter,l the .upper and lower sides' of the tubewill. be transverselysevered along the lines "of theserrated edges, withone sideof the Itube extending slightly beyondlthe other` as usuali l i.f fold lines of the vbottom and with the rear- Ward flap extendingvupwardA in'position to" be acted upon and folded down by the travel- Theprogressive feeding, of the leading, end ofV the tube to and beyond theserrated cutting members is effected by a pair of roll- 1 'ers 7 (Figi.`8) which constitute part of the 75 usual tubefforming and slittingmechanism which rollers are concertedly driven by appropriate gearlng.including the I neshinor gear wheels 7?* (Fig. 1) on their respectivshafts. x80

pair Of'parallel shafts 8 providedwith in? termittently-acting pinchrollers 9 (Figs. 2

fand 3) between which the leading end ofv the travelin tube extends,said rollers be,-

lng provide with peripheral ribs 10 which are so disposed as to bite andclamp the tube. at predetermined intervals during'its travel` and thustemporarily check the advancement 'of the tube. Theends of the rollershafts. 8 are. provided with meshing gear Wheels 11, (the upper one ofwhich is shown in Fig. 2') the lower shaft being provided witha gearwheel 12 which is driven from an intermeshing idler gear 14.' (See Fig.l). Thus the pinch rollers are continuously driven. The timing andrelation of the lparts are such that the clamping of ,the tubey y thepinch rollers is edected when the slitv ted portion of the tube is inproper position for .severance at the serrated members; A t this.juncture an upwardly-traveling bar 15 is brought forcibly against theunderside of the tube, immediately. in fro-nt of said members,therebysharply severing the bag blank from. the body of the tube. Thisbar .is car-A ried a pair'of spaced endless chains 16 whichpass aroundupper and lower sprocket Wheels l1 7, 18 respectively. The upper Wheelsareloosely mounted on the shaft S' Vand the. lower Wheels `are fixed toa shaft 19 Vand that,l as thes'eclamping Iand. lsevering mechanisms`comprise continuously rotating parts they can be. efectlvely. driven'at.a

relatively highspeed. i

When the, tubing has .been .advanced into 130 lfreeend extends betweena. pair of drawing rollers v22, 23, one (22) ofmvbich is mounted .onthemain shaft and the other {23)jon an -,upper parallel shaft 24.` Theperiphery of the upper roller is mutilated as at 25 in `order thatthebag blank shall be intermit- `tently grasped and released by the segmental acting surface 25 of the r'oller, such imn'iedituly after it hasbeenv severed from "the bodyof the tube and released by the`pinchrollers 9 and being of suiiicient circumferential' extenttoadvance the blank to the bite of a pair of forwardingrollers 26,27'which are carried by parallel shafts 28,

29, respectively, having their bearings in. boxes in the sides of themainframe. The

`roller 23 is secured to its shaft 24 by means of a set screw 23a (Figs.2 and), in the hub ,of the roller, whereby said. roller may be nicelyadjusted about the' shaft inorder toi set'itsacting surface -at anyvpredeter- Vmined positionin relation to the'roller 22',

as the length of `ftlie'bag blank may require.

22 'is provided with a--circumferential elec j tro-type which isdesigned, by its rolling contact with the opposingfside of the traveL 30ingbag blank, to print any suitable' matter- 'w thereon,...` [In Fig. 3I have illustrated acouple jo Y bedriven by suitable gearing.L .35 Theshafts-of theforwarding rollers 26, 27.are provided at one side of themachine :with meshing. gear wheels 33,' and the lower shaft isprovidedat theother side of the :4 0l an idler whioh, in turn, meshes with thegear Wheell .on the drive shaft. Thus the rollers 2G, 27- are`properly'driven in order y blank toward the grip-` f ylinder 3.6.` hiscylinder is carriedfby aft37 whiohshasits bearings .in boxes in e@sidesof l the mainframe. On one end of shaft-is a` gear wheel 38-in meshwith v3.9 whidh, in'turn, meshes with the eel 34 on the roller shaft 28.

.understood .the speed at which the fed t'oand across the path of the ndgripping mechanisms deter- -,thej, length of 'the bag blanks, such aanfiler rollers 7 ;V and` as the `cylinder and rlng roller aredriven at afixed speed tively `zto. eachgfother it has heretofore nnecessary to'adjustv theinbodily toward `fror'n the feeder-Oilers 7 inorder to adapt`-empio t, however, of drawing rollers of thenliaraceab yedescribed,`lamenabled fjsimply by the fota'ry adjustment of thel 4rollerto yvary its point and period of ens jposition to beiclamped by therollers 9,"its

filinkingrollers 3,1, 32 for applying l. the ink to thetype block, whichrollers may machine withla gear wheel 34 in'mesh with one end with anlarm 47 bearing at its free termined intervals of their traverse the'n'eing prescribed by the gearing ofl sa forwarding roller and cylinder. to1re-' Lv .il:.ceiyeiblgnkgg`Qofsdiiferentlengths.` -By the.

gagement with the -roller 22 tof'acegrd with the predetermined lengthofthe, blgtijksand thus accomplish their uniform residing and deliveryto the forwarding roller and grip- 'pingcylinder. 70

On the periphery of the upper forwarding roller 27 is a. pair of spacedpoints 40 which are so locatedthat when the leading end of the bagblankenters between and is gripped by the rollers 26, 27, the points 75lpenetrate theopposing tonguesl formed betweenthe parallel slits in theblank and thus positivelycarry the blank onward against the surface ofthe upper roller 27 A curved guide plate 41 (Fig. 3) arranged adjacentgdr; the upper` roller, insures the upward dev flection of the leadingend of the blank,i At a suitable distance apart on the periphery 'ofthis roller, parallel with its airis, are creasing ribs 42 which engagethe opposing g5 surface of the traveling blank and, in coaction withcorrespondingly located grooves in the lower roller, crease the blanktransversely to provide properly spaced fol lines for the bottom of thebag. 9o As the blank is being carried upward by the roller-27', the freeouter end of the tongue formed between the parallel slits in the underlayer of the tubular' blank, springs forwardly against the opposingperiphery .pf 9.5 thecyl-inder 36 and is there received and i grasped bya pair of vibratory gripping fingers 43 which extend through a, slot inthe periphery of the cylinder.. The under tongue just referred to issomewhat longer than the other tongue and the prolonged.

` por-tion of the former, extending beyond thel points 40, springsoutwardly and is grasped by the gripping ngers 43. These fingers arecarried byblocks 44 which are clamped toa Arock shaft 45 having itsbearings in inwardly-projecting lugs 46 on the rim of the cylinder,'which shaft is provided at or near Afingers, to receive. the leadingend of the .tongue as the blank is being carried upward -by the roller27 and .then perinitsthe closing of the iingers against the tongue; and

the cam 51is so located as to effect the open.

fing vofthe fingers and the release ofthe tonguel after the blank hasbeen impelled about halfjfway varound the cylinder and just before Vtheoperation of completing the 136 j vablestop `forthe block against theopposing j `end of'therolle'r, and thus permits the pressure of thefmgerupon the peripheryvof the 'rollerzto be nicely determined.

i i vThe inward movement of the sleeve and its appurtenances as justdescribed is effected l during the rotation of the roller27, sothat thefinger will be brought gradually to bear upon and travel concurrentlywith the un derlying folded edge portion of the bag i blank.` When thesleeve lis retracted the block and finger are caused to resume theirnormal position to free the edge of the block and quickly raise thefinger.

1 grip and thentorelea'se the opposing folded sleeves is provided at itsouter end with a suitably-,disposed cam projection78 which at thepropertime) encounters a relatively ,fixed stud or roller 79 which forces thesleeve inward,` such sleeve, when `the cam lprojection' clears' the studor j roller, resuming its normal.outerpositiom a y Y f The studs or4rollers 7 9` for the respective vsleeves 'are 'preferably mounted onbrackets 80' formedon collars 81l which are loosely `applied to theshaft ofthe upper roller 27, `and i are provided with adjusting ldeviceswhereby the studs `or'jrollers. canbe nicely j set to the proper pointsof action with respect tothe travel of the' cam projection. Inthepresent instance each ofthe collars the outere'nd of which extendsadjacent to I a fixed `bracliet 83 on the side of the main frame, and;`1s secured to said bracket by a c adjustment ofthe arm 1n a verticalare. A `spring 85 secured `at its respective ends to .je the arm `andmainframe tends to dravv'down the youter end ofthe arm, and aset-screw86, which is applied to that end of thev arm in position to bear uponthe. bolt, affords a Vready -means whereby the arm can be very nicelyadjusted inopposition to the force of the spring, preparatory to thetightening positionv 'of adjustment. By referenceto Figs. 11-to 14,inclusive, Q the' construction fand operation ,of the tuck appear. These-ngers comprise comparaftively long. metal plates which are affixed f`"to blocks87 at the respective ends of the cylinder in lline with eachother. IThese blocks "are formed on or affixed to the outer ends of -twoshaft sections 88, 89 respectively,-which ar'elrotatably supported in abored projection` on,` the` inner side of the gitudinal movementrelatively to each other.

\ i blank,'the spring initially acting to tilt the 15 i The sleeves.attherespective. ends of the roller are simultaneously actuated, firstto `edges of the blank. To this end each of theV is provided withaninclined radial arm'82,.

screw-bolt 84#the .i slot for which, in the -ar`m, is'elo'ngatedinord'er'to'permit limited 'ff of the boltafnd the lockin of the arm inits' lSee Figs. 2, 3,391..

' `fingers-65and their'actuating parts will cylinder, which sections arecapable of lonf They are connected by a shaft 90, which is fast to oneand is slidingly fitted to a longitudinal bore'v in the other, theAlatter `being slotted, ras at 91, for the reception of a reside piece 92on the shaft 90, whereby thi' "two sections can be rotated as a unit andyet be capable of relative longitudinal movement. i

Within the bore of the bearing projection, at a point intermediate theshaft sections, is-secured a head V98 between the oppositev sides ofwhich andthe opposing ends of the respective shaft sections areinterposed springs 9d which tend to maintain the sections normally -1projected be-. YQIKl the adjacent ends of the, cylinder. (See Figs. 11and 13). On the outer end of each of the blocks 87 is a roller 95 whichat ajpredetermined time encounters a segmental cam 96 convenientlysecured to the `inner side of the maink frame, said cam be` y ingconstructed and arranged to press lthe opposing shaft lsection and itsparts, including the finger, inward against the action of the spring911l and tomaintain them thus positioned for. a prescribed period.

See Fig, 11);

, The fingers are normallycaused ytoibearupon or vrest near theperiphery of the cyl blocks are constructed to force the armtemporarily'outward in opposition to the action of the spring 97 and thus swing thetwo fingers 65 away from the periphery of the cylinder.' (See Fig. 12).When the roller escapes the camblocks, the fingers ll.;

resume 'their normal bearing position. The

initial end of thecam 96.', and :theadjacent cam 102are properlydisposed in 'relation to each other in order that the lifting of thevtvvo'fingers shall be simultaneous, and that the combined inward .andl.lowering motions of the fingers shall be concurrent. (See Fig. 12.)' Asthe fingers are' designed to'enter the intuckedporticns of the blankduring the spreading thereof, as above described, the elevating surfaceof the cam y1027is constructetpanfl arranged to'eifect the raising ofthe iingersfioefore they reach Ill-5 the gripping point, and thelowering sur face of said cam, together with the iiiclined initialsurfaces o f the. cams 96, are`constructed .and arranged to effect thecom bined lowering and inward motions of ithe fingers `immediately aftertheyhave thus.

been raised. i

The ,cams 96 have sufficient circumferenisc . tial ektent to maintainthe fingers in their inward .gripping position until the bottom 'of -theb'ag has been lnearly completed at which time the rollers escape thesaid cams (See lig.l

andthe fingers are retracted. 13). The cam 103 is disposed adjacent theterminal end of the proximate cam` 96 so'v as to eiiect therequisite'elevation of the fingers just before or as they are withdrawn.

When the blank is engaged by the two' -sets 'of lingers 64, 65, aspreviously described, its free 11p-projecting vportions pass intofandbetween a pairV vof inclined -4 side folding-jmembers 105 which extend jward on the cylinder, the folding members *gradually press the-411p-projection :sides a (Figs. 20, 21 and22) of the blank inward' anddownward upon the underlyi ing 'bottom portion ofthe. blank and aft ftheLSametime-flatten down the adjacent 25 end portions a2 of the blank, sothat the tongues thereof extend in opposite directions as illustratedmost clearly in Fig. 22.

" The fingers' 65 are released from" the blank at or about the timethey' pass nbeyond the folding members. Each oftheside folding memberscomprisesfa bar having the inwardly beveled orfA inclined top portion4'1'0'6flandftlie'tdepending. side .2107, the Vwhole 1 constituting, ineffect, a Xed camof appropriete formy to impart the requisite inward'fold to the contiguous portions of lthedzravelirig blank. The lowerendsv of the two bars are alixed` to and supported gripping fingers 43,are two set'sfof transr verse grippers 112, 113,' fwh1ch are;des1gned,st lccessivelyT to receive and crease ythe' bottom Mounted o nthecylinder 36 in s by means of clamp brackets 108. dependin from asuitably disposed cross-baronsha t 109, and' theopposite ends of'thebarsrest upon the peripheryi of thejcylinder, and

are held in position by means ,of adjustable clamp brackets 110 on across bar-Sor'4 shaftI 111. (See Figs. 2,'3and l tion to each other,=immediately in rear of the portion of the blank, throughout itswijdth,after it passes from'the side folder g-.the re- 'zspective lines ofgripping. being the v transverse creasing ribs 42 `on the roller 27Vabove de-.

fold lines` of the bottomv defined by the ,"jscribed. -The forwardgripper112 comprises a jaw bar whichv extends into--a,transyerse slot112EL in the wallof the cylinder, one lside lE of said slotconstitutingone of the ipper jaws. The jaw. bar is'aixed to areeJAshaft, .114 which isV j ournaled in -v lugs115 Lon the Tanner side -ofthe cylinder, [one end lof the vshaft being provided with an arm bearling a roller 117 which, atipredeternnned 1n?- paced rela",

tervals, contacts with suitably-located 'camblocks 118, 119 andisthereby actuated-to open the jaw in opposition, to the actionjof aspring 120` which encircles a ,projectingv endy of the shaft andisvsecuredi to a collanon the' latter andto the adjacent lugofthe-cylinder so as-to exertva torsional closing force on the jaw.1 Thecam blocks 118, 119J are adjustablymounted, similarly to the am blocks50, 51 above described, ona' 'segmental l frame 52a bolted tot-hcadjacent side of, the' 75 main frame. (See Figs. 2, y,3,-and 15.),`One (118) v01:' the camblocks is so,arranged.that p when the gripper 112is directly above `the l axis'of the cylinder the gripper' is open; andat this juncture a rotating tueking blade 121 of usualfoonstructionimpinges upon the blank, transversely thereof, and tucks `it be' tweenthe open jaws of the gripper. 'the bladevv in' its rotation recedesfrom*` the intucked blank, thejaws forcibly grasp and ltransverselycrease the latter.

The tucker blade 121.is carried by an arm 122 on-a cross-shaft 123 which'has its bearings in boxes in the sides of the main frame," sald shaftbeing actuated throughV al gear wheel 124 in lmesh with the. gear wheely38A on the cylinder shaft. f .j The rearward gripper 113 includestwo-'jaws whichextend into a transverse slot 125 in the wall of thecylinder. The forwardjaw comprises a bar 126m which is iixedgatitsrespective ends to'lugs 127 on two? annular frames 128 carriedI A.bythel respective ends of the cylinder, and the rearward jaw comprises afvibratory bar ahxed 4to' a roclrshaft 129 which is jour naled in saidlugs and i: equipped at one end with an arm 130 bearing #roller-'131,which at predetermined intervals contacts .with the cam block 118andganother suitably 'disposed cam block Allfonfthe frame 52a, and isthereby actuated periodically to open the movable jaw in oppositionto'ithe, actionj. of a suitably-disosed spring 1321; "'.lhilsff springencirclesa rojecting end of theshaftf-ll 129 and is secure to a collaron the-'latter 4and to the adjacent cam' .1fframe 128 sasto exerts-atorsionalclosing force on the ibratbry jaw of the gripper 113.-

.l As the gripper 113 approaches the` ftical plane of the axis o fthecylinder'thel y roller of 'the arm 130 encountersthe 'oppos K ing cam118 and is thereby actuated to openl the. gripper; whereupon a rotatingtucking blade133 4carried by an arrn'on theshaft 12,3,Vimpinges againstthetopof theblank,

transversely thereof, and tucks itbetween. f, the jaws vof the gripper113.,` This blade', similarly to its companion, passes' on'fromtheirl-tucked portion of the blank, andthe jaws' "thereupon -fbrcibly graspandtr'nse verselyjcreasc the latter. In virtue ofthe )creasing or:bending action of the grippers .loo j' ".35 i i marginal portions "oftheblankand press y 113 upon the blank, `the trailing ap portion PM2)`for. thefbottom springs'` upward after it'escapes the'` side-folding`members 106. (See Figs. 15` and 201) f The annular `frames areadjustable within .deiinjedf limits aboutthe axis 4of the cylindersothag the extentof the space between thetwo' pairs of transversegrippers may be n f 'nicelyregulated to accordwith the width ,of thebagbottom... "To this end each ofthe bframes is provided with arms 134radiating `from a hub`135 whichzis loosely mounted on y -the cylindershaftf?, the framebeing adm justably securedvto said arms by bolts 136.w

passing through arc slots in the f rame. The

two frames, are `provided withv corresponding peripheral.gearracks137with which mesh pmlons 1 138 'onfthe respective. ends of the"shaft"13,9"wliiclrhas itsbearings in the arms 2o` ofthe'cylindermwhereby when the bolts are'` loosened thegshaft may bepartially tu rned,yto ,the right or. left,- by means of a suitable" key,so" aslvproperly to move the .annular frames .relatively `to thecylinder I" and .thusadjust grippersll carried tlierebyf towardorzfromlhe grippers`112, as desired. i lVhenfthe requisite adjustment of'thegrippers has been etfcctecbthe frame is ylockedtin position by`theact'oi tightening.,y

thebolts 136.` ',.fp

Asfxthe cyli'lderjl f continues its movement with `the bottom portion ofthe blank trans- ,versely c`la1npeol by the grippers'll and 113, theblank is carried' under a pair. of dependingspringwfingers 142 whichbearupon the thein. snugly against the cylinder. At this stage pasteiisapplied to the in-turned sidefiapsjandthe leading end Hap t2 of theIblanl" `by vmeans offa` rotary. paste-applying A devicewofusual"construction This device i comprises a U-shaped sector head 143mountf ings. inboxes in the sidesof the main frame fand has at oneendlavgear wheel`145 in mesh p withtlie 'gear wheel 3.8 of thecylindershaft. j The head is "supplied with paste from .a

paste-`pan`146 byl means fof an interposed y `feed `roller 147;Lthe'shaft of which. is4

equipped with a pinionV 148 in mesh withthe d gear wheel 145. l. (SeeFigs. 1, l and 3.) i .lVhen thepaste has kbeen applied as just i`intermediate the `grippers." This roller is fcarriedby and betweena'pair of spaced chains "1501.whicl1` pass around "sprocket ,wheels 151on the shaft 144 and around a pairofsmaller sprocket wheels 152 carriedQ shaft- 153- which has its bearings in' adl justable boxesin thesidesof the main framey just beyond the cylinder. Curved guides 154,corresponding with the curvature of the cylinder, are secured to thesides of the main frame, adjacent the respective ends of the cylinder,which guides are constructed and -arrangedto support and guide the`active stretches of the chains traveling adjacent the cylinder, anddirect the .presser roller 149 ina path continguous to and correspondingwith the periphery of the cylinder.' The chains are driven vat af's'peedsomewhat` in excess of the surface speed of the cylinder, and hence thepresser roller as it approaches the cylinder contacts withtheupprojecting flap and' progressively .folds it i down upon andintimately presses it against thelbottom portion of the blank (see Fig,17).7 said bar finally escaping the blank and passingv outwardly aroundthe lower sprocket wheels. The exposed pasted portion ofthe blanlnas ithugs the cylinder,

passes onward and is not engaged by the roller.

At or about the .time the folder and presser roller 149 contacts withthe trailing upstanding portion ol Ythe blank the roller `oftheactuatingarm 130 of the grippcrs 113 encounters the sfjtably-disposedcani-block 118q `on the frame 52a thus opening the grip-- pers 113 andfreeing the portion ot' the bottom clamped thereby. ,Innnediately there-`afterthe roller of the actuating arm 47 of the fingers 43 encountersthe suitably-dis posed cam-block 51 onxthe frame 52 thus .raising thefingers andv releasing; the engaged tongue. The treed unfolded portiona2 of the bottom springs partially outward from the cylinder,` Aand whenthe folder and presser roller 149 escapes the bottom portion of theblank this unfolded portion implnges Vaainst a folding roller 155 whichis mounted to bear against `the periphery ofthe 'cyl inder `at a pointbelow the lower sprocket `wheels 152. This roller thus, as the cylin-Vder rotates, imparts ther-final fold to the bag bottom, as indicated inFig. 19. The roller 155 isjournaled in boxes in the walls of themair'itrame, and is Iprovided at one end with a pinion 15G which isgeared with and prop-- erly driven by av gear wljeel 157 on they end ofthe shaft 153 through' an' interposed idler 15S. (See Fig-1.) Alltag,the final fold has been completed thegrippers 112' are released 'fromthe bag by the roller of their actuzlitingg,"

arm 116 contacting with the suitably-disposed cam block 119 on the frame52?,gwa'nd thereupon the finished bag lisdelivered te. an

ofl`-bearing belt 159 which carries it to a suitable point of discharge.v

The diameter of the'cylinder is preferably i such that severalsuccessive blanks may be progressively actedl upon thereby lat the sametime, as is common in continuous bag makilo ing machines, and hence thecylinder is prol vided 'with aplurality sets offcomplel mentary grippingdevices 4,3v 64A `65 112 113 of the character rabove described;vv thdwhole being arrangedwin spaced relation to each other throughout theperipheryof Ithe cylinder as illustrated inFig. 3. In the presentinstance there are three sets of these'grip-v ping instrumentalities,which are timely ac,- vtnated in their rotation bythe same'sets of cams,that is, the cams bear a predetermined l' relation to eachother and tothe cylinder and correspondingly actuate eachA succeeding 'setbf grppersduring the rotation of the cylinder.

In Figs. `23 and 24; I have illustrated a4 Islight modification. AofltheV gripper devices at the ends of the forwardingroller 27. In thisconstruction the blocks 66 to,which the fingers Mare secured are pivotedto collars l 68 on the spring-controlled sliding'sleeves 69,69respectively, so as to be capable of oscillation in the directionr ofthe aXisof-the roller instead oftdward the endsof the lat-V ter as fin.the lirst .described construction.

Eachof ythe blocks is held normally 1n aY horizontal or clampingposition ley-means of a spring 7 5u which is interposed between theouterv portionv of the ,block and the collar.

On the outer end of the block is a ,stud 1160 bearing a roller ll-which,at proper times -in the rotation of the forwarding roller, 1m-

pinges lagainst kand rides under horizontal cam-l projectionswl, 162;aon a stationary ring 16d concentric with the forwarding roller,-thereb-y tilting the vblock and raising the inwardly projecting linger64 thereof j outwardly beyond the periphery of the roller 27..v Thisringv 163 is carried by the adjust.-

1 able disk 81 which is adapted Asimilarly to the Vcollar "81.hereinbefore described to be adjusted about the rollen'shaft 29 in orderIQbears a cam head formedon the opposing to set the cam projections"162, 162a in proper-y working position. @n the. inner face of the idislr8Lm is an annular flangali which 'is with a projecting' roller'79fagainst which end of the slidingsleeve, the cam surfaces 78 of saidheadbeing so disposed inrelaitio'n to each otherand the cam projections162. 1.62a that while the latter in conjunction *with-the springW areoscillating the block in respect to tlie`pferiphery of the forward-v.ing roller, the sleeveis being'pressedtoward or'retr'acted from tineyend of the vcylinder..

thereby irripartingthe 'combinedoscillatory and longitudinal movementsto the 'iinger during the rotationof the vsaidforwarding roller. "When,the rollers 161, 79 escape 'their respective cams, thelinger 64ansreversely moved from its gripping to its 'original position.

The ring Lil is preferably adjlusta'bly se' cured to the flange 161ibymeans of a set screw 155, the llole .166 for which in the i ring iselongated in order that said ring and flange can be adjustedcircumferentially ofl yeach other to eliect accurate spaced relation ofthe camprojections162, .162 and roller y 79a Vto each other and'to thecam surfaces 78a and roller 161.A

I claim-f 1.'The combination with a forwarding member having means toengage and hold.'-

one end of a tubularblank, a cylinder pro.- vided with gripping means toengage and h'old the end of the opposing layer of the 'l blank, meansforreleasing the blanlfi'from4 the forwarding member after vthe leadingend ofthe blank has been partially opened by the forwarding member andoyllnder, `tuck lingers onsaid member and cylinder respectively, Ameansfor periodically actuat- .ing said fingers to engage'and release therespective opposing sides of the tube, and

stationary side foldingfmembers into which the open leading end of theblank is .advanced by the forwarding member and cyl.-

finderwhile the blankis held by said `memberand the cylinder.

ber, a 'gripper cylinder, y tuck lingers on-"said member and cylinderrespectively, stationary Sidev folding members overlying said inem@ berand cylinder and positioned to receive the open leading end ofthefgliilank while the blank is being carried bysagidimember 'andcylinder, and means for actuating the/tick fingers to edect their'engaging and releasing actions, the period of enggeineilt off. tlfiieiinst at o t e;

lingers of the cylinder'eXcee lingers'.v of the .forwarding member.

a The Combination with a forwarding roller, and a gripper' cylinderadjacent thereto`, of stationary side folding members over-v lyingsaid'roller and cylinder, said member having inclined acting surfaceswith which the open leading end of the blank contacts, *while it isbeing carried by said roller and cylinder. y l i,

fl. The .combination vwith a forwarding .roller, ofg'piyotally mountedAblocks at the ends -of said roller, tuck lingers on said blocks.supports for said blocks, means for periodically moving said supportstoward and from the ends yof 'the roller in a path parallel tothe axisof rotation of said roller, and means for oscillating said blocks andAtheir fingers Yduring the movements of theysupports.

5j The combination'. withl-a forwarding vlroller and its shaft, ofsliding sleevesfon saidshaft adjacent the ends of the roller,

blocks pivoted 'on 'sa-id sleeves, tuck lingers l' on said blocks; meansfor periodically iiovfing the sleeves toward and from the ends of' saidcarriers are l'caused l ff @Yfolderinits travel e Y qj` `flap `portiondown upon and throughent tleqg i, rollerand its shaft, `ofoslidingsleeves on said shaft adjacentl the `ends of the roller,

" i blockspivoted onsaid sleeves, tuck lingers `onfsaid blocks, rneansfor periodically moving the sleeves toward anfdfroin theends of *theroller, and springconnections between lsaidblocks andlsleeves, wherebytheblocks ,and their `fingers are osrillated during the "movements ofthesleeyes toward and' from 7."l`he combination `with `a,".forwardingroller'and its shafniof )pivotally mounted 'blocks at the ends of said"roller, tuck lngers on said blocks, supports for said blocks,

15,", springs toinaintain said supports normally `away romthe ends oftheblocks, abutment devices for perodicallyfengaging the sup- `ports-to`force theni towardtheends of the f roller, adjusting means fornsaidabutanenl;`

` devices, land means for "oscillating said.

blocks and their-lingers during the movements of the"supports.v A

S.` The. combination `with a grippercylinder, of gripping lingers `atthe ends thereof,- zshatt sections for said grippers slidingly e androtatably "mounted, on said cylinder, 1lneans tending to keep the shaftsnormally aparty means tending `to maintain `the lin# gers normallyincontact with the periphery `of the cylinder, means forperiodicallymov.-

' ing the shafts toward eachother, and means for periodically raisingthe fingers trom fthe rperiphery 'of the cylinder. i

The combination`-with the gripper cyl' l index', of `a transverse bottomgripper Inount-- hereon, a secondtransverse bottom grip ged in spacedrelation theretoxend lly mountedV on the cylinder and e latter gripper,rackiand pin- 40 ,K ,between the cylinder and, @the fr. t bycirc,uriferentialeadjustV ment of the rames and cylinder relative toeach` other canfbe ellected toI regulate the [space `between thetransverse bottom grippers, and. means foresecuringsaid frames andcylinder in their position oadjustlmentw e l p 10. The combination withthe gripper cylfinder, gripper jaws thereon.,` and means `for tucking ablank bctweensaid jaws, whereby tsaid blank is crlmsed along` the baseof its trailing `portion andv such portion is upwardly deflected, fofflexible endlessl Vcarriers, means `wherebythe `:native stretches of''to travel adjacent.

*the same direction and curvature l folder said? carriers, and Ameansfor'impelling said carriers, whereby the:

.swings the upstandrng` e aanvinken@ engen ofthe-blank:

, t der, slippen'iWe-` d` inciting` a blank with ecrire Crim means forimpelling the chains whereby the therewith, n k 'drawing mechanismbeyond said y mechanism, forwarding rollers beyond sind 1 cylinarwahsaga' 1; `'Ina.paper ag machine, the combina@y creased along` thebase of its trailing portionand such portion is upwardly deflected, f ofa transverse bottonriolding roller mountl ed to travel adjacent theretoand in the same direction and curvature as the opposing pe-f1 e ripheralsurface of the cylinder, laterali.; chains carrying said roller,sprocket wheels l' for said chains, shafts for said wheels, and f saidroller in itstravel'swings thenpstanding flap portion down upon andthroughout the entire width and length of the blank.

1:2. The combination with the gripper cyl` inder, gripper jaws thereon,and means for .tucking a blank between said jaws, whereby said' blank iscreasedalong the base of its' trailing portion and such portion isvupwardly deflected, of a transverse bottom folding roller mounted. totravel adjacent thereto and in the same direction and. cnrvature as theopposing peripheral'surface ofv the cylinder, lateral chains carryingsaid roller, sprocket wheels' for said chains, shafts for said wheels,means for impellingj 90 4the chainsl wherebythe said roller in itstravel swings the 'npstanding flap portion down upon and throughout theentire'width l `and length. of theblanlsz, a final foldingv roller belowthe chains, andmcans for ro.-I tating said roller.; v e

` 15. The combination with the gripper cylinder, gripper jaws thereon,and means- ,for tucking a blank between said jaws, whereb ',sad blank iscreased along theoo base o "its trai-lin .1 portion and such portion isupwardly eected, a rotary pasteapplying member adjacent thereto, a shaftt upon `which said member is mountedt sprocket wheels on saidA shaft, n.lower' shaft, sprocket wheels 'on the latter, chains" passing around the`upper and lower sprocket wheels, and a transver folding roller carfvried by said chains andadapted to be im- Vcylinderwhereby the sairoller in its travel vs'frngs 'the upstanding flap portion down upon andthroughout the entire Width and length oi the blank. t

'14, The combination' of Atube-cutting' mechanism, gripping mechanismassociated intermittently-acting drawin -meohanism,means on one ofsaid-12oV forwarg rollers for temporarily enga'gvu ing and holdingtho'leadingef o tl1e blaakiwkefirries fi l, 1 uw mffori rerieiallrestreme' 'cereza crible@ ymleradeeet .t Aarardnigao ers ne vices? l ygllhpne @naar the-leyes' i' tho'bla-nlt contiguous thereto,tuckgrlprs-on said'oylinde'n'coa wit ed lingersto Spread the leading 5Pimg. t

Ion 1

